GCN Circular 17180

Subject

GRB 141212A: Swift/UVOT Upper Limits

Event

Date

2014-12-13T10:59:10Z (12 years ago)

From

Samantha Oates at MSSL <sro@mssl.ucl.ac.uk>

S. R. Oates (IAA-CSIC/UCL-MSSL) and T. N. Ukwatta (LANL)
report on behalf of the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 141212A
72 s after the BAT trigger (Ukwatta et al., GCN Circ. 17158Loading...
 
 ).
No optical afterglow consistent with the XRT position
(Osborne et al. GCN Circ. 17164Loading...
 
 )
is detected in the initial UVOT exposures.
Preliminary 3-sigma upper limits using the UVOT photometric system
(Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for the first
finding chart (FC) exposure and subsequent exposures are:

Filter         T_start(s)   T_stop(s)      Exp(s)         Mag

white_FC            72          222          147         >20.6
u_FC               286          535          246         >19.9
white               72         1531          392         >21.2
v                  615         1581          117         >18.8
b                  541         1681          117         >19.8
u                  286         1655          343         >20.1
w1                 664         1631          117         >19.3
w2                 591         1210           39         >18.6

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.10 in the direction of the burst
(Schlegel et al. 1998).